Technical and Management Resources, Inc.

Network Systems Administrator, Journeyman (Tasks 5 & 6)

Job Locations US-DC
Posted Date 2 months ago(8/8/2023 2:59 PM)
Job ID
Security Clearance
Public Trust


The One23Group/TMR, Inc., a Virginia-based Government Contractor, seeks a Network Systems Administrator, Journeyman. 


  • Manage high-volume (more than 1M messages per day) SMTP relays.
  • Manage the Proofpoint mail security system Diagnose mail delivery issues through several layers of security using only logs.
  • Monitor and manage mail routing using an LDAP directory.
  • Perform inspections with the Bluecoat Proxy SG and SSL inspection systems.
  • Diagnose user connectivity issues using logs.
  • Work with partner entities providing in-depth IT investigations.
  • Work with partner entities modifying policies on IT systems.
  • Monitor and manage Infoblox DNS system as well as general BIND/DNS functionality.
  • Utilize the Xymon monitoring system
  • Configure Xymon and creating new monitoring modules.
  • Use Xymon to investigate problems Perform Dynatrace and SNMP-based monitoring.
  • Maintain archival logging for network systems.
  • Implement a Zscaler Zero Trust solution for TIC 3.0 deployment.
  • Manage with Bluecoat IPAM. Administer and manage Unix/Linux operating systems.


  • 3-5 years' of relevant IT experience.
  • 4 years' experience in Network Design, Architecture, Engineering, or Security
  • Experience in analyzing networks and understanding of Cisco switching, routing, firewalls, Intrusion Detection System, and network management and monitoring including OPNET
  • Experience and understanding of DNS, email, web, and file proxies
  • Required - must possess at least one (1) of the following (or other relevant certification):
      • Zero Trust Container Architecture (ZTCA)
      • Zscaler Certified Cloud Administrator - Internet Access (ZCCA-IA)
      • Zscaler Certified Cloud Administrator - Private Access (ZCCA-PA)
      • Cisco Certified Network Professional (CCNP Data Center)
      • CISSP (Associate)
      • Cloud+
      • IAT L3 or Higher
      • IAM L3 or Higher
  • Desired qualifications:
    • Bachelor's Degree preferred
  • Must have a minimum active Public Trust clearance (US citizenship required)


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